Construction waste recycled aggregate surface modification treatment equipment

Abstract

The utility model belongs to material modification technical field, a kind of construction waste recycled aggregate surface modification treatment equipment, including base, pretreatment device and modification unit, after starting equipment, motor drives the rotation of shaft, the rotation speed of shaft is greater than the rotation speed of inner drum by reduction gear set;Construction waste recycled aggregate is input from feed inlet, enters inner drum through cover plate, spiral material guide plate on the rotation of shaft drives aggregate to be transported from left to right, while the brush on the rotation of shaft sweeps aggregate surface impurity, inner drum low-speed rotation auxiliary shaping, impurity falls into U groove through filter hole;The vibrator at the bottom of U groove vibrates, avoid filter hole block and promote impurity to enter impurity discharge port, clean aggregate then enters modification unit through the circular outlet of inner drum and shell, atomizing nozzle in shell sprays modifier, spiral material guide plate continues to transport so that aggregate evenly contacts modifier, finally complete surface modification treatment.

Description

Technical Field

[0001] This utility model belongs to the field of material modification technology, specifically a surface modification treatment device for recycled aggregates from construction waste. Background Technology

[0002] With the acceleration of urbanization, the amount of construction waste generated is increasing year by year, and its resource utilization has become an important way to alleviate the shortage of natural aggregate resources and reduce carbon emissions. Recycled aggregate, as the core product of construction waste resource utilization, can replace some natural aggregates in concrete, road base courses, and other projects. However, recycled aggregate is prone to the adhesion of impurities such as old mortar and dust to its surface, and its particle shape is uneven. Direct use can lead to reduced concrete strength and durability. Therefore, pretreatment and surface modification are necessary to improve its performance. Currently, pretreatment equipment for recycled aggregate has emerged in the industry, but most of these devices suffer from incomplete impurity separation and poor coordination between aggregate conveying and shaping. For example, some devices only use a single drum to screen impurities, lacking auxiliary cleaning structures, which easily leads to filter clogging. At the same time, the aggregate conveying shaft and drum are often designed with synchronous rotation speeds, making it difficult to balance conveying efficiency and aggregate shaping effect, thus affecting the processing quality of subsequent modification units.

[0003] Existing recycled aggregate processing equipment suffers from structural instability and poor connectivity. Firstly, the equipment support frames are often simple rectangular structures lacking specific leveling and positioning designs. This makes them prone to vibrations during installation on uneven ground, leading to component misalignment and shortening equipment lifespan. Secondly, pretreatment units and modification units are often separate units, making aggregate loss or the introduction of external impurities common at their junctions. This not only causes aggregate loss but also affects the uniformity of contact between the modifier and the aggregate. Furthermore, some pretreatment equipment lacks effective dust protection structures, resulting in dust emissions during processing. This pollutes the working environment and may harm the health of operators, failing to meet industry requirements for green production. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a surface modification treatment device for recycled aggregates from construction waste, which solves the problems of incomplete impurity separation and difficulty in balancing conveying efficiency and aggregate shaping effect in material modification equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a surface modification treatment device for recycled aggregates from construction waste, characterized in that it includes a base, a pretreatment device, and a modification unit. The base is welded into an H-shaped rectangular frame, and inverted T-shaped leveling feet are welded to the four corners and the midpoint of the short side of the base frame. The bottom of the leveling feet is a circular steel plate. An L-shaped support plate is symmetrically welded to the left end of the upper surface of the base. A fixing plate is welded to the upper surface of the short side of the base and the right side of the base. The pretreatment device is fixed to the L-shaped support plate and the upper surface of the short side of the base and abuts against the fixing plate. The modification unit is connected to the pretreatment device and welded into the fixing plate. Optionally, the pretreatment device comprises a rotary motor, an inner roller, a U-shaped trough, a rotating shaft, and a spiral guide plate. The rotary motor and the U-shaped trough are connected to each other via a connecting flange. The inner roller is installed inside the U-shaped trough with a gap between it and the trough. The length of the U-shaped trough is shorter than that of the inner roller. The top of the U-shaped trough is covered by a cover plate. A feed inlet is fixed to the right end of the upper surface of the cover plate, with the inlet vertically upward. The feed inlet passes through the cover plate and extends directly into the inner roller. The portion of the inner roller longer than the U-shaped trough is covered by a waste material outlet, with the outlet vertically downward. The rotating shaft is installed... Driven by the rotary motor at its center, the rotating shaft passes through the connecting flange to the tail end of the modification unit. The spiral guide plate is mounted on the rotating shaft and its length is consistent with that of the rotating shaft. The inner roller is connected to the connecting flange through an annular surface. The diameter of the inner hole of the annular surface is consistent with the diameter of the rotating shaft. A reduction gear set is provided on the inner side of the annular surface. The reduction gear set makes the rotation speed of the rotating shaft greater than that of the inner roller. Multiple filter holes are evenly distributed on the surface of the inner roller. A vibrator is vertically connected to the bottom arc surface of the U-shaped groove. Multiple brushes are provided on the part of the rotating shaft located on the inner roller.

[0006] Optionally, the modification unit consists of an atomizing nozzle and a housing. The housing is cylindrical, and the rotating shaft and spiral guide plate extend to the tail end of the housing. A circular outlet is provided at the connection between the waste material outlet and the inner roller. The front end of the housing is connected to the circular outlet. The housing and the inner roller are interconnected. The atomizing nozzle is evenly distributed on the inner side of the housing.

[0007] Optionally, the reduction gear set consists of a gear ring, a driving gear, driven gears, and a connecting frame. The rotating shaft is fixed to the driving gear. The gear ring meshes with the driving gear through multiple driven gears. The connecting frame is fixed on an annular surface and has connecting columns on it that are the same number as the number of driven gears. The connecting columns are fixed to the annular surface.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves thorough impurity separation and high aggregate cleanliness. The filter holes on the inner drum surface can initially screen aggregates and impurities. The vibrator at the bottom of the U-shaped trough acts synchronously on the U-shaped trough and the inner drum, which not only prevents impurities from accumulating and clogging at the filter holes, ensuring screening continuity, but also promotes the smooth entry of aggregate particles into the modification unit and the directional falling of impurities into the waste discharge port, achieving efficient separation of the two. At the same time, multiple brushes are installed on the part of the rotating shaft located in the inner drum. When the shaft rotates at high speed, it can actively clean the stubborn mortar and dust adhering to the aggregate surface. Combined with the friction generated by the relatively low-speed rotation of the inner drum, it significantly improves the cleanliness of the aggregate surface, providing a high-quality substrate for subsequent modification treatment. This invention enables efficient coordination between conveying and processing. The reduction gear set, through the meshing of the gear ring, driving wheel, and driven wheel, makes the rotational speed of the shaft greater than that of the inner drum. The spiral guide plate on the shaft can quickly drive the aggregate to be conveyed from left to right, ensuring conveying efficiency. The lower rotational speed of the inner drum provides sufficient time for the aggregate to be shaped and for impurities to be removed. The brush rotates at high speed with the shaft to complete surface cleaning synchronously. This effectively solves the problem of balancing conveying speed and cleaning effect in the equipment, realizing integrated continuous operation of "conveyor-shaping-cleaning-screening", and greatly improving pre-processing efficiency. This invention achieves uniform and stable modification treatment. The modification unit shell and inner roller are directly connected, and the rotating shaft and spiral guide plate extend to the tail end of the shell, ensuring that the pre-treated clean aggregate enters the modification stage without leakage, avoiding aggregate loss and secondary pollution during transportation. The atomizing nozzles evenly distributed inside the cylindrical shell can cooperate with the continuous conveying action of the spiral guide plate to ensure that the aggregate comes into full contact with the modifier during transportation, ensuring the uniformity of the modification treatment and effectively improving the interfacial bonding performance between recycled aggregate and cementitious materials. Attached Figure Description

[0009] Figure 1 This is a front view schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the modified unit structure in this utility model; Figure 3 This is a front view schematic diagram of the exploded structure of the pretreatment device in this utility model; Figure 4 This is a rear view of the exploded structure of the pretreatment device in this utility model; Figure 5 This is a top view of the U-shaped groove structure in this utility model; Figure 6 This is a front view schematic diagram of the reduction gear set structure in this utility model; Figure 7 This is a rear view schematic diagram of the reduction gear set structure in this utility model; In the picture: 1. Base; 2. Pretreatment device; 3. Modification unit; 4. Leveling foot; 5. L-shaped support plate; 6. Fixing plate; 7. Rotary motor; 8. Inner roller; 9. U-shaped groove; 10. Rotating shaft; 11. Spiral guide plate; 12. Connecting flange; 13. Cover plate; 14. Feed inlet; 15. Waste material outlet; 16. Circular surface; 17. Reduction gear set; 18. Vibrator; 19. Atomizing nozzle; 20. Housing; 21. Gear ring; 22. Driving wheel; 23. Driven wheel; 24. Connecting frame; 25. Connecting column; 26. Filter hole; 27. Brush. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] like Figures 1 to 7 As shown, this utility model provides a surface modification treatment device for recycled aggregates from construction waste. It is characterized by comprising a base 1, a pretreatment device 2, and a modification unit 3. The base 1 is welded into an H-shaped rectangular frame. Inverted T-shaped leveling feet 4 are welded to the four corners of the bottom of the base 1 frame and the midpoint of its short side. The bottom of the leveling feet 4 is a circular steel plate. An L-shaped support plate 5 is symmetrically welded to the left end of the upper surface of the base 1. A fixing plate 6 is welded to the upper surface of the short side of the base 1 and the right side of the base 1. The pretreatment device 2 is fixed to the L-shaped support plate 5 and the upper surface of the short side of the base 1 and abuts against the fixing plate 6. The modification unit 3 is connected to the pretreatment device 2 and welded into the fixing plate 6. Specifically, the base 1 adopts an H-shaped rectangular frame design, which is more rigid than conventional frame structures and can stably support the overall weight of the pretreatment device 2 and the modification unit 3. The inverted T-shaped leveling feet 4 at the bottom are fixed to the ground through bolt holes in the circular steel plate, and their height can be flexibly adjusted according to the flatness of the installation surface, effectively preventing vibration and displacement caused by uneven ground during equipment operation. The pretreatment device 2 is doubly positioned by the L-shaped support plate 5 and the short side surface of the base 1 and abuts against the fixing plate 6. The modification unit 3 is welded to the fixing plate 6 and is connected to the pretreatment device 2. The multi-node fixing structure greatly improves the stability of the connection between the various components of the equipment, reduces component wear during long-term operation, and extends the service life of the equipment.

[0012] The pretreatment device 2 consists of a rotary motor 7, an inner roller 8, a U-shaped trough 9, a rotating shaft 10, and a spiral guide plate 11. The rotary motor 7 and the U-shaped trough 9 are connected to each other via a connecting flange 12. The inner roller 8 is installed inside the U-shaped trough 9 with a gap between it and the trough 9. The length of the U-shaped trough 9 is shorter than that of the inner roller 8. The top of the U-shaped trough 9 is covered by a cover plate 13. A feed inlet 14 is fixed to the right end of the upper surface of the cover plate 13, with the opening vertically upward. The feed inlet 14 passes through the cover plate 13 and extends directly into the inner roller 8. The portion of the inner roller 8 longer than the U-shaped trough 9 is covered by a waste material outlet 15, with the outlet opening vertically downward. The rotating shaft 10 is mounted on the rotary motor 7. The machine 7 is centered and driven by a rotary motor 7. The rotating shaft 10 passes through the connecting flange 12 to the tail end of the modification unit 3. The spiral guide plate 11 is installed on the rotating shaft 10 and its length is consistent with that of the rotating shaft 10. The inner roller 8 is connected to the connecting flange 12 through an annular surface 16. The diameter of the inner hole of the annular surface 16 is consistent with the diameter of the rotating shaft 10. A reduction gear set 17 is provided on the inner side of the annular surface 16. The reduction gear set 17 makes the rotation speed of the rotating shaft 10 greater than that of the inner roller 8. Multiple filter holes 26 are evenly distributed on the surface of the inner roller 8. A vibrator 18 is vertically connected to the bottom arc surface of the U-shaped groove 9. Multiple brushes 27 are provided on the part of the rotating shaft 10 located in the inner roller 8.

[0013] Specifically, the filter holes 26 on the surface of the inner drum 8 can initially screen aggregates and impurities. The vibrator 18 at the bottom of the U-shaped trough 9 acts synchronously on the U-shaped trough 9 and the inner drum 8, which can not only prevent impurities from accumulating and clogging at the filter holes 26, ensuring screening continuity, but also promote the smooth entry of aggregate particles into the modification unit 3 and the directional falling of impurities into the waste material outlet 15, achieving efficient separation of the two. At the same time, multiple brushes 27 are set on the part of the rotating shaft 10 located in the inner drum 8. When the rotating shaft 10 rotates at high speed, it can actively clean the stubborn mortar and dust attached to the surface of the aggregate. Combined with the friction generated by the relatively low speed rotation of the inner drum 8, it significantly improves the cleanliness of the aggregate surface, providing a high-quality substrate for subsequent modification treatment.

[0014] The modification unit 3 consists of an atomizing nozzle 19 and a housing 20. The housing 20 is cylindrical. The rotating shaft 10 and the spiral guide plate 11 extend to the tail end of the housing 20. A circular outlet is provided at the connection between the waste material outlet 15 and the inner roller 8. The front end of the housing 20 is connected to the circular outlet. The housing 20 and the inner roller 8 are interconnected. The atomizing nozzle 19 is evenly distributed on the inner side of the housing 20.

[0015] Specifically, the shell 20 of the modification unit 3 is directly connected to the inner roller 8, and the rotating shaft 10 and the spiral guide plate 11 extend to the tail end of the shell 20, ensuring that the pre-treated clean aggregate enters the modification stage without leakage, avoiding aggregate loss and secondary pollution during the transfer process. The atomizing nozzles 19 evenly distributed inside the cylindrical shell 20 can cooperate with the continuous conveying action of the spiral guide plate 11, allowing the aggregate to come into full contact with the modifier during the conveying process, ensuring the uniformity of the modification treatment and effectively improving the interfacial bonding performance between recycled aggregate and cementitious materials. The reduction gear set 17 consists of a gear ring 21, a driving gear 22, a driven gear 23, and a connecting frame 24. The rotating shaft 10 is fixed to the driving gear 22. The gear ring 21 meshes with the driving gear 22 through multiple driven gears 23. The connecting frame 24 is fixed on the annular surface 16 and is provided with connecting posts 25, the number of which is the same as the number of driven gears 23. The connecting posts 25 are fixed to the annular surface 16.

[0016] Specifically, the reduction gear set 17, through the meshing transmission of the gear ring 21, the driving wheel 22, and the driven wheel 23, makes the rotational speed of the rotating shaft 10 greater than that of the inner drum 8. The spiral guide plate 11 on the rotating shaft 10 can quickly drive the aggregate to be conveyed from left to right, ensuring conveying efficiency. The lower rotational speed of the inner drum 8 provides sufficient time for the aggregate to be shaped and for impurities to be removed. The brush 27 completes surface cleaning synchronously with the high-speed rotation of the rotating shaft 10, solving the problem of "difficulty in balancing conveying speed and cleaning effect" in traditional equipment, realizing integrated continuous operation of "conveying-shaping-cleaning-screening", and greatly improving pretreatment efficiency.

[0017] The working principle and usage process of this utility model are as follows: After the equipment is started, the rotary motor 7 drives the rotating shaft 10 to rotate, and the speed of the rotating shaft 10 is greater than that of the inner drum 8 through the reduction gear set 17. The recycled aggregate of construction waste is fed into the feed port 14, passes through the cover plate 13 and enters the inner drum 8. The spiral guide plate 11 on the rotating shaft 10 drives the aggregate to be conveyed from left to right. At the same time, the brush 27 on the rotating shaft 10 cleans the impurities on the surface of the aggregate. The inner drum 8 rotates at a low speed to assist in shaping. The impurities fall into the U-shaped groove 9 through the filter holes 26. The vibrator 18 at the bottom of the U-shaped groove 9 vibrates to prevent the filter holes 26 from being blocked and to promote the impurities to enter the waste material outlet 15. The clean aggregate enters the modification unit 3 through the circular outlet of the inner drum 8 and the shell 20. The atomizing nozzle 19 in the shell 20 sprays the modifier. The spiral guide plate 11 continuously conveys the aggregate so that it is evenly contacted with the modifier, and finally the surface modification treatment is completed.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface modification treatment device for recycled aggregates from construction waste, characterized in that, The device includes a base (1), a pretreatment device (2), and a modification unit (3). The base (1) is welded into an H-shaped rectangular frame. Inverted T-shaped leveling feet (4) are welded to the four corners of the bottom of the base (1) frame and the midpoint of the short side. The bottom of the leveling feet (4) is a circular steel plate. An L-shaped support plate (5) is symmetrically welded to the left end of the upper surface of the base (1). A fixing plate (6) is welded to the upper surface of the short side of the base (1) and the right side of the base (1). The pretreatment device (2) is fixed to the L-shaped support plate (5) and the upper surface of the short side of the base (1) and abuts against the fixing plate (6). The modification unit (3) is connected to the pretreatment device (2) and welded into the fixing plate (6).

2. The surface modification treatment equipment for recycled aggregates from construction waste according to claim 1, characterized in that, The pretreatment device (2) consists of a rotary motor (7), an inner roller (8), a U-shaped groove (9), a rotating shaft (10), and a spiral guide plate (11). The rotary motor (7) and the U-shaped groove (9) are connected to each other through a connecting flange (12). The inner roller (8) is installed inside the U-shaped groove (9) with a gap between the inner roller (8) and the U-shaped groove (9). The length of the U-shaped groove (9) is shorter than that of the inner roller (8). The top of the U-shaped groove (9) is covered by a cover plate (13). A feed inlet (14) is fixed on the right end of the upper surface of the cover plate (13) with the opening vertically upward. The feed inlet (14) passes through the cover plate (13) and directly into the inner roller (8). The part of the inner roller (8) longer than the U-shaped groove (9) is covered by a waste material outlet (15) with the opening vertically downward. The rotating shaft (10) is installed on the rotary motor (7), an inner roller (8), a U-shaped groove (9), a rotating shaft (10), and a spiral guide plate (11). The rotating motor (7) is at the center and driven by the rotating motor (7). The rotating shaft (10) passes through the connecting flange (12) to the tail end of the modification unit (3). The spiral guide plate (11) is installed on the rotating shaft (10) and its length is consistent with the rotating shaft (10). The inner roller (8) is connected to the connecting flange (12) through the annular surface (16). The diameter of the inner hole of the annular surface (16) is consistent with the diameter of the rotating shaft (10). A reduction gear set (17) is provided on the inner side of the annular surface (16). The reduction gear set (17) makes the rotation speed of the rotating shaft (10) greater than the rotation speed of the inner roller (8). Multiple filter holes (26) are evenly distributed on the surface of the inner roller (8). A vibrator (18) is vertically connected to the bottom arc surface of the U-shaped groove (9). Multiple brushes (27) are provided on the part of the rotating shaft (10) that is located on the inner roller (8).

3. The surface modification treatment equipment for recycled aggregates from construction waste according to claim 2, characterized in that, The modification unit (3) consists of an atomizing nozzle (19) and a housing (20). The housing (20) is cylindrical. The rotating shaft (10) and the spiral guide plate (11) extend to the tail end of the housing (20). A circular outlet is provided at the connection between the waste material outlet (15) and the inner roller (8). The front end of the housing (20) is connected to the circular outlet. The housing (20) and the inner roller (8) are interconnected. The atomizing nozzle (19) is evenly distributed on the inner side of the housing (20).

4. The surface modification treatment equipment for recycled aggregates from construction waste according to claim 2, characterized in that, The reduction gear set (17) consists of a gear ring (21), a driving gear (22), a driven gear (23), and a connecting frame (24). The rotating shaft (10) is fixed to the driving gear (22). The gear ring (21) meshes with the driving gear (22) through multiple driven gears (23). The connecting frame (24) is fixed on the annular surface (16), and the connecting frame (24) is provided with connecting columns (25) in the same number as the driven gears (23). The connecting columns (25) are fixed to the annular surface (16).

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